Data: Annual-Cycle Movements and Phenology of Black Scoters in Eastern North America

This data file consists of R code and associated data files used to analyze movements of black scoters in Eastern North America and is associated with the manuscript "Annual-Cycle Movements and Phenology of Black Scoters in Eastern North America" published in Journal of Wildlife Management.

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blsc.csv (main datafile) contains state-space model-derived locations and individual data. Columns are organized as follows:

id - unique identifier

date - date of location (mm/dd/yy)

jday - Julian date of location

year - calendar year of location

lon - longitude of location

lat - latitude of location

b - average assignment of location to either migrant (1) or resident (2) across all runs of the state-space model

b.5 - most probable behavioral category based on average state assignment (1 = b ≤ 1.5 ; 2 = b > 1.5)

sex - sex of individual (M = male, F = female)

age_y1 - age of individual (HY = hatch year, SY = second year, TY = third year, ASY = after second year, ATY = after third year, AHY = after hatch year

capture_reg - general area where individual was captured

capture_subreg - specific region within capture region where individual was captured

stage - period of the annual cycle to which the centroid belongs (W = winter, B = breeding, S = spring staging, M = fall staging and molt, WM = winter migration, BM = breeding migration, MM = molt migration, SM = spring migration)

site - position of centroid within season (i.e., W1 = first site occupied during winter, W2 = second site occupied, etc.)

cycle - number of annual cycles following transmitter attachment (1 = first cycle after attachment, 2 = second cycle after attachment, etc.)

season - season of annual cycle in which centroid occurred (W = winter, F = fall, B = breeding, S = spring

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ind_vars.csv contains additional information on individual capture seasons and dates. Columns are as defined above with additional columns as follows:

tagging_season - season in which bird was captured and fitted with PTT (W = winter, S = spring)

tagging_date - date on which bird was captured and fitted with PTT

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all_seasons2.csv contains calculated values for between-year distances. Columns are as defined above with additional columns as follows:

sex - AVG = average of all sites used by all other individuals in the following year, M = sites used by same individual in the following year (male), F = sites used by same individual in the following year (female)

min_same = distance between sites used in subsequent years